gitlab-org--gitlab-foss/spec/lib/gitlab/diff/highlight_spec.rb
Sean McGivern cdf3ae04f8 Fix 500 error when diff context line has broken encoding
Rugged sometimes chops a context line in between bytes, resulting in the context
line having an invalid encoding: https://github.com/libgit2/rugged/issues/716

When that happens, we will try to detect the encoding for the diff, and
sometimes we'll get it wrong. If that difference in encoding results in a
difference in string lengths between the diff and the underlying blobs, we'd
fail to highlight any inline diffs, and return a 500 status to the user.

As we're using the underlying blobs, the encoding is 'correct' anyway, so if the
string range is invalid, we can just discard the inline diff highlighting. We
still report to Sentry to ensure that we can investigate further in future.
2018-02-22 12:26:23 +00:00

99 lines
3.8 KiB
Ruby

require 'spec_helper'
describe Gitlab::Diff::Highlight do
include RepoHelpers
let(:project) { create(:project, :repository) }
let(:commit) { project.commit(sample_commit.id) }
let(:diff) { commit.raw_diffs.first }
let(:diff_file) { Gitlab::Diff::File.new(diff, diff_refs: commit.diff_refs, repository: project.repository) }
describe '#highlight' do
context "with a diff file" do
let(:subject) { described_class.new(diff_file, repository: project.repository).highlight }
it 'returns Gitlab::Diff::Line elements' do
expect(subject.first).to be_an_instance_of(Gitlab::Diff::Line)
end
it 'does not modify "match" lines' do
expect(subject[0].text).to eq('@@ -6,12 +6,18 @@ module Popen')
expect(subject[22].text).to eq('@@ -19,6 +25,7 @@ module Popen')
end
it 'highlights and marks unchanged lines' do
code = %Q{ <span id="LC7" class="line" lang="ruby"> <span class="k">def</span> <span class="nf">popen</span><span class="p">(</span><span class="n">cmd</span><span class="p">,</span> <span class="n">path</span><span class="o">=</span><span class="kp">nil</span><span class="p">)</span></span>\n}
expect(subject[2].text).to eq(code)
end
it 'highlights and marks removed lines' do
code = %Q{-<span id="LC9" class="line" lang="ruby"> <span class="k">raise</span> <span class="s2">"System commands must be given as an array of strings"</span></span>\n}
expect(subject[4].text).to eq(code)
end
it 'highlights and marks added lines' do
code = %Q{+<span id="LC9" class="line" lang="ruby"> <span class="k">raise</span> <span class="no"><span class="idiff left">RuntimeError</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="s2">"System commands must be given as an array of strings"</span></span>\n}
expect(subject[5].text).to eq(code)
end
end
context "with diff lines" do
let(:subject) { described_class.new(diff_file.diff_lines, repository: project.repository).highlight }
it 'returns Gitlab::Diff::Line elements' do
expect(subject.first).to be_an_instance_of(Gitlab::Diff::Line)
end
it 'does not modify "match" lines' do
expect(subject[0].text).to eq('@@ -6,12 +6,18 @@ module Popen')
expect(subject[22].text).to eq('@@ -19,6 +25,7 @@ module Popen')
end
it 'marks unchanged lines' do
code = %q{ def popen(cmd, path=nil)}
expect(subject[2].text).to eq(code)
expect(subject[2].text).not_to be_html_safe
end
it 'marks removed lines' do
code = %q{- raise "System commands must be given as an array of strings"}
expect(subject[4].text).to eq(code)
expect(subject[4].text).not_to be_html_safe
end
it 'marks added lines' do
code = %q{+ raise <span class="idiff left right">RuntimeError, </span>&quot;System commands must be given as an array of strings&quot;}
expect(subject[5].text).to eq(code)
expect(subject[5].text).to be_html_safe
end
context 'when the inline diff marker has an invalid range' do
before do
allow_any_instance_of(Gitlab::Diff::InlineDiffMarker).to receive(:mark).and_raise(RangeError)
end
it 'keeps the original rich line' do
code = %q{+ raise RuntimeError, "System commands must be given as an array of strings"}
expect(subject[5].text).to eq(code)
expect(subject[5].text).not_to be_html_safe
end
it 'reports to Sentry if configured' do
allow(Gitlab::Sentry).to receive(:enabled?).and_return(true)
expect(Gitlab::Sentry).to receive(:context)
expect(Raven).to receive(:capture_exception)
subject
end
end
end
end
end